Road Stream Crossing Site EUP_CRW_UN01
Carp River Watershed
Charles Road
Mackinac County
Information collected by:
Site Location
GPS Coordinates: 46.0147587,-84.742518
T 042N R 004 Sec 24
Fish Passability: Barrier at Most Flows
Structure is NOT Perched
Total Erosion: 0.36 tons/year
Overall Score: 27
Severity: Moderate
Date Inventoried: 4/2/2021
Road Approach - Left
Road Approach - Right
Inlet
Upstream Conditions
Outlet
Downstream Conditions
Representative Reach
Site Sketch
Crossing Information*
Type of Crossing: Culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: None
General Conditions: Major deterioration from corrosion or abrasion (10-50% of the length of structure is rusted through) or cracking or spalling or chipping (large chunks sloughing off, large cracks, exposed metal reinforcement). OR Major shape changes (described above) reducing the capacity of the structure by up to 50%. OR segment disconnection with evidence of water piping under or around the culvert.
Structure Interior: Corrugated
Is Structure Rusted through? Yes
Dimensions of Structure: Length 35.8 ft. Width 2 ft. Height 2 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.9 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.1 ft./sec.
Structure Outlet
Water Depth: 0.7 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.9 ft./sec.
*Water Velocities were measured 0.5 ft. below the surface (via Flow Meter).
Stream Information
Stream Flow: < Bankfull – The stream channel is more than half filled with water, but is not full.
Stream Flow Type: Perennial (if flowing during the time of assessment.)
Is Scour Pool Present? Yes
Scour Pool: Length 11.5 ft., Width 10 ft., Depth 2.1 ft.
Is Upstream Ponding Present? Yes
Pond: Length 7 ft., Width 7 ft.
Riffle Information
Water Depth: 0.5 ft.
Bankfull Width: 8 ft.
Wetted Width: 6.4 ft.
Water Velocity: 1 ft./sec. (measured via Flow Meter)
Dominant Substrate: Gravel – rocks between the size of a pinhead and a baseball
Road Information
Road Surface: Gravel
Owner: Federal
Road Condition: Old Pavement or Rutted, Minor cracking or rutting/ponding at crossing all or part of crossing length.
Road Core Integrity: Good (no symptoms of lack of integrity)
Road Width at Culvert: 15 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 2.2 ft.
Slope: Gentle, 3:1, 15°, or 33%
Downstream
Fill Depth: 2.3 ft.
Slope: Gentle, 3:1, 15°, or 33%
Approaches
Left Approach
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Right Approach
Length: 200 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.36 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0.36 tons/year
Summary Information
Fish Passability: Barrier at Most Flows
Is a future visit to this site recommended? No
Were any non-native species observerd at this site? No
Site Comments: Undersized culvert, rusted.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.